First ride and reaction in a 408 turbo GMC on just 12lbs making 800Hp

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  • Опубліковано 21 сер 2024
  • First ride and reaction in a 408 turbo GMC on just 12lbs making 800Hp. John is getting this bad boy dialed in and ready to hit the track soon. Looking for some low et and high horsepower.

КОМЕНТАРІ • 23

  • @patrickbecker2481
    @patrickbecker2481 8 місяців тому +1

    Can’t wait to have mine running! This motivates me a lot! 10.3:1 fully forged 408 with an 88/108. HOPING to make 1000 wheel.

    • @JaMRacing
      @JaMRacing  8 місяців тому

      That’s going to be a beast

  • @michaelbrowning4403
    @michaelbrowning4403 3 роки тому +1

    Looks like you guys had alot of fun.

  • @ccooper04
    @ccooper04 3 роки тому +1

    Makes me want to build a 408 more and more. I have a FI485 already just need to get the engine together and let it rip

    • @wazzym290
      @wazzym290 3 роки тому +2

      I just got my 408 done and has a 80mm on it-- I will pick it up this week sometime

  • @badgerrun8771
    @badgerrun8771 2 роки тому +3

    Whats the compression on the engine? im building a forged bottom end 408 right now and it's gapped for up too 15 pounds of boost and just looking for something to compare with. Great truck and build.

    • @JaMRacing
      @JaMRacing  2 роки тому +2

      It’s 11 to 1. It’s gone 5.98 on 20psi in the 1/8

    • @destruxandexploze2552
      @destruxandexploze2552 Рік тому

      11 to 1 and you’re running boost? Are you pulling timing?

    • @anewzack78
      @anewzack78 Рік тому

      ​@@destruxandexploze2552 lots of LS builds run "high" compression with boost. Easy to do on like a Terminator X or something

  • @twiztedmind864
    @twiztedmind864 3 роки тому +1

    Not the first time he has had issues with something being too short.

  • @travisvandinter6642
    @travisvandinter6642 3 роки тому +2

    Damn dude. I’m sure the video audio doesn’t do it justice.

    • @JaMRacing
      @JaMRacing  3 роки тому

      No it doesn’t. Man it was so loud and so damn fast.

  • @kolbyhumbert2680
    @kolbyhumbert2680 2 роки тому +1

    It made 800whp on 12lbs? What fuel? & what heads & cam

    • @JaMRacing
      @JaMRacing  2 роки тому +2

      E85, PRC 237 heads, John bewley custom grind cam

    • @kolbyhumbert2680
      @kolbyhumbert2680 2 роки тому +1

      @@JaMRacing good numbers, thanks for the info

  • @kester45
    @kester45 2 роки тому +1

    Do you know what headers he is running?

    • @JaMRacing
      @JaMRacing  2 роки тому

      Huron speed manifolds that he modified.

  • @JussLvn
    @JussLvn 2 роки тому +1

    What turbo ?

    • @JaMRacing
      @JaMRacing  2 роки тому

      Hahahaha

    • @destruxandexploze2552
      @destruxandexploze2552 Рік тому +1

      @@JaMRacing I think he was legitimately asking what model turbo it is.

    • @JaMRacing
      @JaMRacing  Рік тому

      @@destruxandexploze2552 oh ok. I know its a T4 but don't know the size of it sorry.

    • @JaMRacing
      @JaMRacing  Рік тому +1

      miss understood. I know its a t4 but don't know the size of it sorry.